If no sound is coming out of the projector:
Be sure you have an audio cable securely connected between the
projector and the input device.
Be sure that the mute and volume settings are correct on the input
device, such as a computer, DVD player, or camcorder.
Open the on-screen menu and select audio. Check the following
Mute is turned off.
Volume is correct.
Internal speakers are turned on.
Audio input select shows the correct audio input for your
If the projector speakers interfere with an external audio system:
Open the on-screen menu and select audio > Internal speakers.
Then, disable the internal speakers.